Achron, the Arcing Fist

+2: Deal 3 damage to any target, if it dies because of this damage, exile it instead.
-4: Deal 4 damage to target player, then 2 damage to each creature they control. If any creature dies from this damage, exile it instead.
-10: Deal 10 damage to target player and each creature they control. If any creature dies from this damage, exile it instead.